Etiologic agents jc virus jcv of pml bk virus bkv of urinary tract disease a human b cell lymphotropic polyomavirus is suspected to exist on the basis of serologic evidence simian virus 40 was a contaminant of early poliovirus vaccines sources jcv and bkv transmitted person to person probably by the respiratory route viruses excreted . The papovaviruses are small dna containing viruses consisting of the papilloma and polyoma subgroups certain similarities shared by members of the group that is size structure type of nucleic acid ability to cause tumors and so on led to the proposal that they be placed in the papovavirus group. read the papovaviridae the polyomaviruses the viruses uploaded by beatrix potter viruses excreted in urine donor kidneys may introduce infection in recipients of renal transplants clinical manifestations occur mainly in immunosuppressed populations as a result of virus reactivation pml is a rare fatal disease with an insidious onset and symptoms reflecting multifocal involvement of the
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